[Abstract in English, main text in Dutch; updates: 3 June; 12 June; Updated version in English: https://hectorreban.wordpress.com/2015/07/10/an-alternative-track-trail-another-buk-on-another-day/ ]
[Abstract in English, main text in Dutch; updates: 3 June; 12 June; Updated version in English: https://hectorreban.wordpress.com/2015/07/10/an-alternative-track-trail-another-buk-on-another-day/ ]